In [1]:
from pathlib import Path
from ipyniivue import download_dataset
BASE_API_URL = "https://niivue.com/demos/images/"
DATA_FOLDER = Path("images")
# Download data for example
download_dataset(
BASE_API_URL,
DATA_FOLDER,
files=[
"mpld_asl.nii.gz",
],
)
Downloading mpld_asl.nii.gz... Dataset downloaded successfully to images.
In [2]:
import ipywidgets as widgets
from ipyniivue import NiiVue, SliceType
try:
import nibabel as nib
except ModuleNotFoundError:
!pip install nibabel
import nibabel as nib
example = DATA_FOLDER / "mpld_asl.nii.gz"
volumes = [
{
"path": example,
"colormap": "gray",
"opacity": 1.0,
},
]
nv = NiiVue(slice_type=SliceType.MULTIPLANAR)
nv.load_volumes(volumes)
nvols = nib.load(str(example)).shape[-1]
slider = widgets.IntSlider(min=0, max=nvols - 1, description="Volume")
def update_frame(*args):
"""Select the frame corresponding to the slider value."""
nv.volumes[0].frame_4d = slider.value
slider.observe(update_frame, "value")
display(slider)
display(nv)